Supersnelle erbijsommen en erafsommen tot 20
In de mix
|
1.
19 + 0 =
4
19
3
2
|
2.
7 – 4 =
4
3
1
2
|
3.
15 – 3 =
12
2
1
3
|
4.
7 – 7 =
2
3
0
4
|
|
5.
13 – 4 =
9
3
2
1
|
6.
11 – 2 =
9
1
2
3
|
7.
5 + 12 =
17
3
4
2
|
8.
4 – 4 =
0
4
2
3
|
|
9.
3 + 6 =
9
1
2
3
|
10.
13 + 1 =
1
3
2
14
|
11.
17 – 15 =
2
1
4
3
|
12.
1 + 8 =
2
1
3
9
|
|
13.
18 – 8 =
1
3
10
2
|
14.
8 + 6 =
14
2
1
3
|
15.
1 – 1 =
2
0
4
3
|
16.
13 – 4 =
1
9
2
3
|
|
17.
20 – 18 =
3
4
2
1
|
18.
14 – 12 =
1
2
3
4
|
19.
13 + 4 =
3
17
4
2
|
20.
14 + 1 =
3
15
2
1
|